/*
 * Copyright (C) 2005 Jimi Xenidis <jimix@watson.ibm.com>, IBM Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * $Id$
 */

#ifndef _BITOPS_H
#define _BITOPS_H

#include <config.h>

static inline int
ffs(int b)
{
	uval i = (uval)b;

	return bit_log2(i & -i) + 1;
}

/*
 * unlike ffs(), returns first zero position, lowest order bit is 0.
 */
static inline uval
ffz(uval i)
{
	if ((i = ~i) == 0) {
		return sizeof (uval) * 8;
	}
	return bit_log2(i & -i);
}

#endif /* ! _BITOPS_H */
